Chain-links.



H. E. HAYWARD.

CHAIN LINKS.

APPLIOATION FILED DBO.18, 1909.

Patented June 13 1911.

rm: NORRIS PET wnsnmcrou, 5. c.

UNITED STATES PATENT OFFICE.

HENRY E. HAYWARD, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO LINK-BELTCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

T 0 all whom it may concern:

Be it known that I, HENRY E. HAYWARD, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Chain-Links, of which the following is a specification.

My invention relates to certain improve ments in drive chains in whichthe links are provided with teeth which engage the teeth of sprocketwheels. Chains of this type are made up of a series of link elementsplaced side by side and one set of links isusually connected to anotherset by a pivot pin having projecting heads and washers.

The object of the present invention is to so construct the outside linksof the chain as to protect the heads and washers of the pivot pins andat the same time strengthen the links. This object I attain in thefollowing manner, reference being had to the accompanying drawing, inwhich Figure 1, is a side view of a drive chain illustrating myinvention; Fig. 2, is a sec tional view on the line 2-2, Fig. 1; Fig. 3,is a side View of one of the outside link elements; Fig. 4, is atransverse sectional view on the line ir-4, Fig. 3; Fig. 5, is atransverse sectional view on the line 5 5, Fig. 3; and Fig. 6, is aperspective view of one of the link elements.

A and B are the gether by pivot pins are made up of link spectively,placed side by side, in Fig. 2.

a, a are the outside link elements of the links A and my inventionrelates particularly to certain improvements in these elements.

Referring now to Figs. 3, 4 and 5, a is a link element having openings(4 for the passage of a pivot pin, this opening is jncreased in diameterat one side to receive an extended bearing of an adjoining link. Theextended bearing 0 of the link element a fits in a corresponding openingin an adjoining link. Each link element has a tooth a; at each end inthe present instance, and the outer edge of the tooth has a bearingsurface, and this bearing surface I preferably extend by bending themetal forming the tooth at right angles, so as to provide anextendedbearing c. The pivot pin D in the present instance is reduced ateach end and a washer d is mounted on the reduced end, and theprojecting portions of the pivot pin chain links coupled to- D. Thelinks A and B elements a and 6, re-

as indicated CHAIN-LINKS.

Specification of Letters Patent. Patented J 11116 13, 1911 Applicationfiled December 18, 1909. Serial No; 533,814.

are riveted, forming heads (Z which project beyond the washers.The'heads and washers project beyond thesurface of the body of the linkelement a and in order to protect the heads of the pivot pins Iflangethe link elements a at e and c; the flange 6 extends along the upperedge of the link elements 0. and is tapered at 6 toward the bearing 0'of the teeth while the flange 6 extends along the lower edge of theteeth, as indi-v cated in Fig. 3, and is tapered at each tooth. Thesetwo flanges not only protect the pivot pin from wear due to rubbingagainst the flanges of the wheels, but also materially strengthen thelink and do not interfere with the proper running of the chain.

I may, in some instances, form a lateral projection on the upper edge ofthe link, as at f, Fig. 6, this projection extending laterally the samedistance as the extended bearings c, c, contacting with a projection onan adjoining link. This particular feature is set forth and claimed in apending'application filed by James M. Dodge, November 6th, 1909, underSerial No. 526,536.

I do not in this application claim the extended tooth bearing or theextended bearings for the pivot pins in themselves, as my invention islimited to the features set forth in the claims following.

I claim 2- 1. The combination in a chain of a plurality of sets oflinks, alternate sets of said links including one or more plane linksand two flanged links respectively mounted on the outer sides of saidplane link or links, with means for connecting the various links.

2. The combination in a chain of a plurality of sets of links havingopenings and extended bearings capable of fitting openings in otherlinks, certain of said sets of links including one or more plane linksand flanged outside links, with means for bold ing the links together.

3. The combination in a chain of a plurality of sets of links havingopenings and extended bearings capable of fitting openings in otherlinks, certain of said sets of links including one or more plane linksand flanged outside links, both theplane and the flanged links havingteeth provided with laterally extending bearing faces.

4. A chain link element having openings for pivot pins and provided withteeth having bearing faces extending at an angle to each other, with aflange projecting from one edge of the link element and terminatingadjacent tosaid bearing surfaces.

5. A chain made up of a series of sets of link elements; headed pivotpins connecting the elements of one set with those of another set;washers on the pivot pins bearing against the outer link elements, saidlatter elements having flanges at the top and bottom extending beyondthe heads of the pivots the link elements having extended bearings forthe pivot pins and being provided with teeth having laterally extendedbearm s.

l3. A chain link element having openings for pivot pins and providedwith teeth having bearing faces'extending at an angle to each other,with flanges projecting from the top and bottom edges of the link andterminating adjacent said bearing surfaces of the teeth.

7. A chain link element consisting of a plate having teeth and openingsfor pivot pins, laterally extended bearings adjacent said openings,laterally extended bearings for the teeth, and a laterally projectingflange on the link.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

. HENRY E. HAYWARD.

Witnesses:

WALTER CHISM, WM. A. BARR.

Copies of this patent may be obtained for five cents each, byaddressing'the Commissioner of Patents,

Washington, D. C. a

